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Joseph O'Brien's Images

Title: Plant Pathologist
Organization: USDA Forest Service
Unit: Forest Health Protection
Country: United States

Joe is a plant pathologist with the U.S. Forest Service in St. Paul, Minnesota. in addition to photography, his major interests include tree diseases in forests, woodlands and urban areas, hazard tree identification and mitigation, and mycology. Joe is a graduate of the University of Michigan (B.S. Forestry and M.S. Forest Pathology) and the University of Minnesota (Ph.D. Plant Pathology), and currently works at the Northern Research Station on the University of Minnesota's St. Paul campus.
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29 Images of 12 Subjects View Subject List View Image Details View Thumbnails

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Image Subject Name Scientific Name Description
5033076 deer Deer vertebra found on forest floor.
1198021 porcupine Erethizon dorsatum Although climbing an aspen to avoid the photographer, these slow-moving creatures like to eat the bark of pine trees in the Lake States.
1397096 pileated woodpecker Dryocopus pileatus
1397095 pileated woodpecker Dryocopus pileatus
5045064 moose Alces alces A grazing moose, at Yellowstone Park
5298034 pileated woodpecker Dryocopus pileatus Piliated woodpecker injury on bole of tree.
5298035 woodpeckers Extensive decay and woodpecker damage on dead bole.
5298036 pileated woodpecker Dryocopus pileatus Pileated woodpecker injury.
5298037 pileated woodpecker Dryocopus pileatus Pileated woodpecker injury on bole.
5298039 woodpeckers Holes in bole caused by woodpeckers.
5297087 American beaver Castor canadensis A beaver lodge
5031001 pileated woodpecker Dryocopus pileatus
5031002 pileated woodpecker Dryocopus pileatus
5031003 pileated woodpecker Dryocopus pileatus
5031016 porcupine Erethizon dorsatum
5031017 porcupine Erethizon dorsatum
5029004 porcupine Erethizon dorsatum
5027039 acorn jay Garrulus glandarius cache created by the acorn jay
5035048 pileated woodpecker Dryocopus pileatus
5035049 pileated woodpecker Dryocopus pileatus hole in branch
5045099 greater flamingo Phoenicopterus ruber
5034005 red fox Vulpes vulpes
5037092 Pacific banana slug Ariolimax columbianus
5033019 American beaver Castor canadensis tree fall caused by beaver chewing
5038012 cattle Bos spp. cattle grazing in woodlot
5033018 American beaver Castor canadensis dam
5033041 white-tailed deer Odocoileus virginianus buck rub
5033017 American beaver Castor canadensis
1198004 porcupine Erethizon dorsatum Chewing damage

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